<template>
  <div class="login_container">
    <div class="login-box">
        <!-- 图片区域 -->
        <div class="avatar_box">
            <img src="../assets/logo.png">
        </div>
        <!-- 登录表单区域 -->
        <el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules" label-width="0px" class="login_form">
            <!-- 用户名区域 -->
            <el-form-item prop="username">
                <el-input v-model="loginForm.username" :prefix-icon="Avatar" />
                
            </el-form-item>
            <!-- 密码区域-->
            <el-form-item prop="password">
                <el-input v-model="loginForm.password" :prefix-icon="Lock" type="password" />
                
            </el-form-item>
            <!-- 按钮区域 -->
            <el-form-item class="btus">
                <el-button type="primary" @click="login">登录</el-button>
                <el-button type="info" @click="resetLoginForm">重置</el-button>
            </el-form-item>
        </el-form>
        
    </div>

  </div>
</template>

<script >
import { mapMutations } from 'vuex'
import { Avatar,Lock } from '@element-plus/icons-vue'
import { ElMessage } from 'element-plus'
import qs from 'qs'
 export default {
   setup(){
       return{
            Avatar,
            Lock
        }
    },
    data(){
        return{
            //登录数据表单的绑定对象
            loginForm:{
                username:'',
                password:''
            },
            
            //表单的验证规则对象
            loginFormRules:{
                //验证用户名是否合法
                username:[
                    { required: true, message: '请输入用户名', trigger: 'blur' },
                    { min: 3, max: 10, message: '长度在3到10个字符', trigger: 'blur' },
                ],
                //验证密码是否合法
                password:[
                    { required: true, message: '请输入密码', trigger: 'blur' },
                    { min: 6, max: 15, message: '长度在6到15个字符', trigger: 'blur' },
                ],
            }
        }

    },
    
    methods:{
        ...mapMutations(['changeLogin']),
        //重置按钮可重置表单
        resetLoginForm(){
            
            this.$refs.loginFormRef.resetFields();
        },
        //对整个表单的内容进行验证
        login(){
            let params={
                username:'admin1',
                password:'000000',
            }
            this.$refs.loginFormRef.validate( async valid=>{
                if(!valid) return
                const {data:res} = await this.$http.post ('/api/login',qs.stringify(params))
               
                // console.log(this.loginForm);
                if(params.username!==this.loginForm.username || params.password!==this.loginForm.password) return ElMessage.error('用户名或密码错误'); 
                ElMessage.success('登录成功')
                //将登录成功后的token保存在客户端的sessionStorage中
                window.sessionStorage.setItem('token',res.meta.token)
                //通过编程式导航跳转到后台主页，路由地址是/home
                this.$router.push('/home')
               
             })  
            
            
    
        }
    }
};

</script>

<style lang="less" scoped>
.login_container{
    background-color:#2b4b6b ;
    height: 100vh;
}
.login-box{
    background-color: #fff;
    height: 300px;
    width: 450px;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%);
    .avatar_box{
        height: 120px;
        width: 120px;
        border: 1px solid #eee;
        border-radius: 50%;
        padding: 10px;
        box-shadow: 0 0 5px #ddd;
        position: absolute;
        // left: 50%;
        // transform: translate(-50%);
        margin: -65px auto 0 auto;
        left: 35%;
        background-color: #fff;
        img{
            height: 100%;
            width: 100%;
            border-radius: 50%;
            background-color: #eee;
        }
    }
    
}
.login_form{
    position: absolute;
    bottom: 0;
    width: 100%;
    padding:0 20px;
    box-sizing: border-box;
}
.btus{
    display: flex;
    justify-content: flex-end;
}

</style>